In data applications built with Morph, you can utilize user information to perform role-based access control. In Python functions on the Morph framework, you can receive an argument called context: MorphGlobalContext. User information is stored in the user_info variable of this context.

MorphGlobalContext

Details of the user information that can be obtained from the context.user_info variable in Python
The type of the context.user_info variable is as follows:
VariableDescriptionType
user_idUser IDstr
emailUser’s email addressstr
usernameUser’s namestr
first_nameUser’s first namestr
last_nameUser’s last namestr
rolesUser’s project roleslist[str]

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Setting Project Roles

The roles variable in the context.user_info variable stores the user’s project roles. Project roles are roles that can be set for users in each project. They can be set in the “Member Access” tab of the project details. project-user-role

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Using roles in local environment

Since the development environment does not pass authentication information for the dashboard, the following fixed values are stored in context.user_info. 
{
    "user_id": "cea122ea-b240-49d7-ae7f-8b1e3d40dd8f",
    "email": "mock_user@morph-data.io",
    "username": "mock_user",
    "first_name": "Mock",
    "last_name": "User",
    "roles": ["Admin"],
}

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Customizing project roles in local environment

Create a /path/to/project/.mock_user_context.json file and save the value in the same type as the above JSON, then the value of context.user_info will be automatically switched. You can implement role-based access control by changing the setting value of roles.
You can also switch user information by passing the JSON data as an unsigned JWT token to the authorization header.

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Sample code

The following sample code is for displaying a Pygwalker dashboard only if the user has the Admin role. 
import pandas as pd
import morph
from morph import MorphGlobalContext
from morph_lib.types import HtmlResponse
import pygwalker as pyg

@morph.func
@morph.load_data("example_data")
def create_pygwalker_dashboard(context: MorphGlobalContext):
    data = context.data["example_data"]
    if "Admin" not in context.user_info["roles"]:
        return HtmlResponse("You are not authorized to access this dashboard.")

    return pyg.to_html(data)